Liquid dispenser



Jan. s, 1924.

G. A. BOBRICK ET AL LIQUID DISPENSER Original Filed Feb. 1'?, 1916 A 03,31@ a d origini appnuaun ma reinar;

Patentedl Jan. 8, 1924.

UNITED v STATES PATENT carica.

` cnam n. nonnicx nin mmm; L sonn'icx, or Los wenn, cmromin.

To all whom it may concern.'

Be it known that we, GABRIEL A 4Boiiizici: and ARTHUR L. Boiucx, citizens of the United States, residin lat Los Angeles, in

the county of Los Ange es and State of California, have invented a new and useful Liquid Dispenser, of which the following is cification.

is invention relates to apparatus for dispensin measured or predetermined quantities of liquid, and articularly to means for measuring or pre etermining the quantity to be dispensed, and-dispensin or dischargin the same, by means of t e force devices are to be supplied either by gravity or pressure and where the tubes or channels connecting the reservoir with the dispensers are extended horizontally as well' as vertically or bent in curves whereby the liquidis required to ow from the reservoir tothe dispensers not simply vertically but horizontally and, in many cases, down and up again or vice versa.

An object of the invention is to construct a liquid dispenser which will prevent the entrance of air into the tubes supplying the' liquid to the dispenser.

Other objects are to provide such a construction Vand interrelation of parts as to land. in the interrelations and combmat positively measure or determine the quantity of liquid dispensed by each operationof av plunger or'piston; to pxrevent a oontinuousow of liquid when t e di nser'is4 in o ration; to prevent allleakage om the disc ar e nozzles so that the liquid is diss charge only in the 'predetermined quantity and at the predetermined time and there is no drip or waste of the liquid.

A further object is to provide such interrelation of parts as shall be extremely simple to make and install and which shall be eilicient'in operation and cheap to maintain. The invention consists in the construction of parts hereinafter described and moreripgg.

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17, 1918, Serial I0. 78,814. Divided and this application lied. Icvm ber 27, 1920. Serial No. 426,680. y

ticularly pointed out in the claims and will be more readily understood by' reference to the accompanyin drawi forming a part of this specification, and in which:

Figure 1 is a vertical sectional view of a lavatory, of a sleeping car, having installed therein a reservoir and dispensers embodyinour invention;

ig. 2 isa longitudinal sectional view of a dispensing device embodying our inven tion the same being shown in normal or closed position; v

Fig. 3 is a similar view of the construction shown in Fig. 2-, the parts'being i'n operated position. f

In Fig. 1 of the drawin we have'shown or indicated a liquid supp y rescrvoir`1 havin a main tube 2.1ead1ng therefrom which is 1n turn connectedl to two branch tubes 3, each in turn connected with a tube 4 in turn communicating with the dispensing devices 4closed b da cap 8. The ca 8 is preferably provide with a vent 9 an vvalves or cocks 10 may be interposed between the reservoir 1 and the dispensing devices to close communication between the reservoir and dispensin devices when desired.

he body 11, see Fig, 2, is provided with suitable means, such as a shoulder 12, threaded portion j13 and nut 14 -for securin the body 11 to the top plate'15 of a-was basin. As shownv the body 11 is inserted through an openin made in the late, resting with the shoul er 12 on top o the plate and secured thereto b the nut 14. A washer 17 ma be inter ose between the shoulder 12 an the to o the plate 15 and a.v washer 17 between t e nut 14 and the bottom of the 'the operating parts or mechanism of the dispenser.

hollow plunger or piston 20 is mounted n the bore, the piston portion being of such diameter as to make a close working fit in the bore 18 of thel body 11. The upper portion of the piston 2O is slightly reduced in diameter, as shown, to form the hub 24, thereby leaving an annular space or chamber 25 between such hub and the wallof the bore 18. The portion of the bore 18 below the piston we term the receiving chamber 18 and the portion above the piston the discharge chamber 25. The end or upper edge of the hub 24 is adapted to abut against the wall 26 of the chamber 25 and act as a valve for normally closing communication between vthe space or chamber 25 and the bore 19 to avoid all possibility of leakage in case theworking fit of the piston is not suliiciently close. 27 represents an upward extension of the piston 20 forming a stem or iston rodof smaller diameter than the main iston 20. This piston rod or stem 27 exten s through the bore 19 to the outside of the body 11. The portion 28 of the piston rod Aor stem 27 which connects with the `hub 24 of the piston 20 is recessed or made ofsmaller diameter than the upper end of the piston rod, so as to form an annular` space or chamber 29 between the re- V4cessed portion 28 of the stem 27 -and the wall of the bore 19.A

As shown the piston 20 is hollow and a portion of its bore 21 is contracted to form toward the upper portion ofthe piston the channel 33 which also extends within the reduced or stem portion 27. The nozzle 32 is preferably formed separate from the body 1 1 and provided with a threaded end to screw into the threaded opening 30. The nozzle 32 is provided with a duct or passage 31v and vthrough the opening 30 communicates with the small bore 19.

Preferably the piston stem or rod 27 is provided on its outer end with a suitable push button or handle 35 and a suitable stuiiing boxis formed aboutI the stem on the outside of the body 11. This stung box, as shown, 'consists of a suitable packing-37 (of asbestos or other suitable mate-h rial), a gland 38, and an internally thread-l ed cap 39 engaging the external thread of the end of the body 11. This stuing box is provided primarily to compensate for possible wear between the stem 27 and wall of the bore 19. l

The loweror open end of the hollow piston 20 is preferably internally threaded to receive a similarly threaded hollow plug or bushing 40. The top of the bushing 40 forms a seat for a valve 22. The valve 22 is normally held on its seat by the spring 23. The tension of the spring 23 should 'be such as to Ahold the valve 22 seated -against the normal pressure of liquid in the receiving chamber of the dispenser.

The delivery mechanism comprises the v'alve 22, preferably provided with a hub for the valve. A washer 44 may be interposed between the valve 22 and its valve seat. vA plug 45 is screwed into the bushing 40 and is so formed on its outside as to accommodate a packing or cup 46 made of leather or other suitable material. The plug 45 is provided with a channel 47 and with one or more perforations or ports 48 in its side wall and with a perforation 49 in its end Wall. This perforation 49 serves as C*a guiding channel for the rod 43. The channel 33 serves as a guide for the rod 42. The valve 22 is thus held in axial position in relation to the chamber 21 and the valve seat 44 when opening or closing. The perforations or ports 48 serve as passages for the liquid from the receiving chamber 18 into the piston chamber'21 when the valve ent for Liquid Dispenser Serial No. 78,814

filed February 17, 191.6. For thisL purpose the open end of the receiving chamber 18 is closed with a plug 50, provided with a channel 51, the inner end of which is closed to form an anvil or stop 52. The diameter of the inner end of the plug 50 is contracted to vform a hub 53, and one or more perforations orports 54 connect the channel 51 with the receiving chamber 18. When the valve 22 is seated the guiding rod 43 extends outside the plug 45 about half way between the top of the anvil 52 and the bottom of said plug 45.

A spring 61 is located in the lower portion of the bore 18, one end of the spring abuts against the inner end of the plug 50, the other end against the lower end of the plu 47. The spring forces the piston outwar ly'vwhen pressure on the push-button 35 is released and it holds the valve 24 seated when the dispenser is at rest.

A port or ports 60 connect the piston chamber 21 with the chamber 25. y

The operation is as follows: The person desiring a supply of liquid soap pushes the push button 35 inwardly thus forcing the piston inwardly until the end of the guiding rod 43 reaches the anvil 52; the further advance of the piston inwardly, with the rod 43 resting on the anvil, holds the valve 22 stationary and the further inward movement of the piston disen ages the valve 22 from its seat thus establishing communication'between the receiving-v chamber 18 below the piston and the piston chamber 21. The reservoir l being in direct communication'with the receiving chamber 18 and the liquid in said receiving chamber being uninterruptedly under pressure it iiows from spring is pushed outwar y the valve 22 remains open until the piston has reached a point at which the rod 43 willv lift itselifrom the anvil. The liquid entrapped in' the chamber above the piston will be forced out through the nozzle by the further outward advance of the piston. To prevent a continuous flow of the liquid from the nozzle when the valve 22 is open, the distance of the extension of the guiding rod 43 outside the plug 45 and the length of the recess 29 in the piston rod are so gaged that the moment the guiding rod 43 reaches the anvil the end 55 of the recess closes the outlet 30, ysee Fig. 3. It is understood that about half of the motion of the piston on its inward stroke and about half of its motion on the outward stroke are lost.

We claim:

1. The combination with a hollow ybody having an outlet near one end and an inlet near the other end, a hollow piston mounted in said body to reciprocate therein between said inlet and outlet, a receiving chamber formed below said piston and a discharge chamber formed above said piston, said piston provided with a bore having inlet and outlet ports; a valve seat and valve within said bore to open and close communication between the inlet and outlet ports; a stem extendin from the valve through said valve seat an adapted to contact with a portion of said body to open said valvey upon each 'inward stroke of said piston, and a spring holding said valve seated until positively opened by contact of the valve stem with the body.

2. The combination with a hollow body having an outlet near one end and an inlet near the other end, of a hollow piston mounted in said body to reciprocate between said inlet and outlet, a receiving chamber being formed below said piston and a. discharge chamber being-formed above said piston, a spring adapted to exert its tension to move said piston to its upper position, a stem for said piston extendin out through said body, said piston provided with a port near its stem end, a valve seat formed Within the piston, a valve within said piston cooperating with said seat and having a stem extending through said valve seat and adapted` to contact with a portion of said body to open said valve upon the inward stroke of said piston, and a spring normally hold# ing said valve seated.

3. The combination with a hollow body having an outlet near one end andan inlet near the other end, of a hollow piston mounted to reciprocate in said body between said inlet and outlet, a receiving chamber being formed below said piston and a discharge chamber being formed above said piston, a stem for said piston projecting through said body, said piston provided with a port near its stem end, a valve seat-formed at the lower end of said piston, a valve within -said piston having a stem extending through said valve seat and adapted to contact with a portion of said body to open said valve upon the inward stroke of said piston, a spring normally holding said valve seated, and a spring mounted in said receiving chamber to exert its tension to move said piston to the upper limit of its stroke.

GABREL A. BOBRICK. ARTHUR L. BOBRCK. 

